WO2004103759A1 - トラクタ - Google Patents
トラクタ Download PDFInfo
- Publication number
- WO2004103759A1 WO2004103759A1 PCT/JP2003/009130 JP0309130W WO2004103759A1 WO 2004103759 A1 WO2004103759 A1 WO 2004103759A1 JP 0309130 W JP0309130 W JP 0309130W WO 2004103759 A1 WO2004103759 A1 WO 2004103759A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gear
- shaft
- transmission
- piece
- slide
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
- F16H37/04—Combinations of toothed gearings only
- F16H37/042—Combinations of toothed gearings only change gear transmissions in group arrangement
- F16H37/046—Combinations of toothed gearings only change gear transmissions in group arrangement with an additional planetary gear train, e.g. creep gear, overdrive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
- B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D49/00—Tractors
Definitions
- the present invention relates to a tractor.
- a mission section is linked to the motor section to transmit power to the front wheels and rear wheels from the mission section to enable traveling.
- the main section and the sub-transmission mechanism are provided in the section, so that the gear can be shifted in multiple stages, and the mission section has a creep speed change mechanism, so that the gear can be operated for ultra-low speed running.
- a tractor in which a mission section is interlockedly connected to a prime mover section to transmit power to the front wheels and the rear wheels from the mission section to enable traveling, and a creep is applied to the mission section. It is an object of the present invention to provide a tractor characterized in that the speed change sections are detachably connected to each other.
- the present invention is also characterized by the following configurations.
- a planetary gear mechanism that can reduce the power from the main transmission mechanism is provided in the mission section, a creep drive gear is provided in the carrier that forms a part of the planetary gear mechanism, and a cleave transmission section is provided in the cleave drive gear. Input gear of the cleave transmission mechanism The key is detachably combined.
- FIG. 1 is a side view of a tractor according to the present invention.
- Figure 2 is a side view of the clutch and the mission.
- FIG. 3 is an explanatory cross-sectional side view of the clutch unit and the transmission unit.
- FIG. 4 is an explanatory cross-sectional side view of the clutch unit.
- FIG. 5 is an explanatory cross-sectional side view of the main transmission unit.
- FIG. 6 is a sectional rear view of the main transmission unit.
- FIG. 7 is an enlarged sectional rear view of the upper portion of the main transmission section.
- Fig. 8 is a cross-sectional side view of the auxiliary transmission portion and the PTO transmission portion.
- FIG. 9 is a cross-sectional plan view of the differential mechanism.
- FIG. 10 is a rear view of the PTO transmission section.
- Fig. 11 is a partially cutaway rear view of the PTO transmission section.
- Fig. 12 is a cross-sectional side view of the clutch unit of the single clutch type.
- FIG. 13 is an explanatory side sectional view of a subtransmission portion as another embodiment. ⁇
- FIG. 14 is an explanatory sectional side view of a subtransmission portion as another embodiment.
- the transmission section is interlocked to the prime mover section, and power is transmitted from the transmission section to the front wheels and the rear wheels, respectively, so that the tractor can travel. It is freely linked and connected.
- a planetary gear machine in which the power from the main transmission mechanism can be reduced in the mission section
- a creep drive gear is provided on a carrier that forms a part of the planetary gear mechanism, and the input gear of the cleave transmission mechanism provided in the cleave transmission section is detachably connected to the cleave drive gear.
- the creep transmission portion has an opening formed in the mission case of the mission portion, a lid is detachably attached to the opening to close the lid, and a creep transmission mechanism is provided on the inner surface of the lid. Is configured.
- FIG. 1 A shown in FIG. 1 is a tractor according to the present invention.
- the tractor A is provided with a prime mover unit 2 on an airframe 1 and a transmission unit 4 interlocked with the prime mover unit via a clutch unit 3.
- a driving unit 5 is disposed on the transmission unit 4, and a PTO transmission unit 6 is detachably connected to a rear portion of the transmission unit 4 so that the front axle case (shown below) is located below the body frame 1.
- a pair of left and right front wheels 7, 9 are linked to the transmission section 4 via rear axle cases 8, 8 (see Fig. 9). Connected.
- Reference numeral 10 denotes a front guard frame
- 11 denotes a rear guard frame
- 12 denotes a top link for connecting the working machine
- 13 denotes a lower link for connecting the working machine
- 14 denotes a connecting piece for the working machine.
- the motor unit 2 has an engine 15 mounted on an airframe 1 and the engine 15 is covered with a bonnet 16 so as to be openable and closable.
- the clutch unit 3 rotatably supports an inner / outer double drive shaft 18 extending forward and rearward in a clutch housing 17.
- the driving shaft body 18 is formed of an inner drive shaft 19 extending in the front-rear direction, and a cylindrical outer drive shaft 20 rotatably fitted on the outer periphery of the inner drive shaft 19.
- the base end (front end) of one of the inner drive shafts 19 is linked to the engine 15 via a traveling clutch 21, and the front end (rear end) of the inner drive shaft 19 is described later.
- a base end (front end) of the other outer drive shaft 20 is interlocked with the engine 15 via a PTO clutch 22.
- the front end (rear end) of 20 is linked to a PTO transmission mechanism 52 to be described later.
- a front end edge of a main transmission case 53 of the transmission section 4 described later is detachably connected to a rear end edge of the clutch housing 17.
- the inner / outer dual drive shaft body 18 has a front end portion. The rear end is pivotally supported by a bearing 25 disposed at a front portion of a main transmission case 53.
- a rear wall 27 having an opening 26 in the center is formed on the inner peripheral edge of the rear end of the clutch housing 17, and a cylindrical support 28 extending in the front-rear direction is formed on the rear wall 27.
- the tubular support 28 supports the inner and outer dual drive shaft 18 in the middle and the outer peripheral surface.
- the cylindrical support 28 has a front portion 28a located in the clutch housing 17 formed in a reduced diameter, while a rear portion 28b located in the main transmission case 53 has an enlarged diameter.
- a mounting flange piece 28c is formed on the outer peripheral surface, the mounting flange piece 28c is brought into contact with the rear surface of the rear wall 27 of the clutch housing 17 from the rear, and is mounted by a mounting bolt 29.
- the inner drive shaft 19 is formed by being divided into a front split drive shaft piece 30 and a rear split drive shaft piece 31, and both split drive shaft pieces 30 and 31 are interlocked and connected within the outer drive shaft 20.
- the split position (interlocking connection position) between the front split drive shaft piece 30 and the rear split drive shaft piece 31 is set in the vicinity of the connection between the clutch housing 17 and the main transmission case 53, that is, the cylindrical support. It is located in the rear part 28b of the body 28.
- the distal end of the front split drive shaft piece 30 and the base end of the rear split drive shaft piece 31 are engaged with each other and are removably linked to each other.
- a fitting projection 30a is provided on the distal end surface of the front split drive shaft piece 30 so as to project rearward, while a proximal fitting recess 31a is formed on the base end face of the rear split drive shaft piece 31.
- the fitting protrusion 30a is fitted in the base fitting recess 31a, and a spline groove 30b formed on the outer peripheral surface of the distal end of the front split drive shaft piece 30, and a rear split drive shaft piece are formed.
- a cylindrical connector 32 whose axis is oriented in the front-rear direction is spline-fitted to a spline groove 31b formed on the outer peripheral surface of the base end portion of the base 31.
- the outer drive shaft 20 is formed by forming the front portion 20 a to have a small diameter along the outer peripheral surface of the inner drive shaft 19.
- the rear portion 20b is formed to have a large diameter along the outer peripheral surface of the tubular connector 32, and a bearing is formed between the outer peripheral surface of the rear portion 20b and the inner peripheral surface of the rear portion 28b of the cylindrical support 28. 33 and 34 are interposed.
- the distal end of the outer drive shaft 20 extends rearward from the rear end of the tubular support 28, and the PTO drive gear 20c is integrally formed on the outer peripheral surface.
- Reference numeral 35 denotes a PTO drive gear supporting bearing.
- the inner drive shaft 19 is divided into the front split drive shaft piece 30 and the rear split drive shaft piece 31, and both split drive shaft pieces 30 and 31 are interlocked in the outer drive shaft 20.
- the conventional technology that is, the front end of the inner drive shaft is extended to the position rearward from the front end of the outer drive shaft, and the input shaft of the PTO system is
- the clutch housing 17 and the main transmission case 53 are connected in the front-rear direction as compared with the prior art in which the base housing is abutted against the base end and connected together on the same axis. Even when the inner and outer dual drive shafts 18 are inserted into the inside 53, the disadvantage that the main transmission case 53 becomes long in the front-rear direction can be solved.
- the transmission case 53 can be shortened in the front-rear direction to reduce the size of the aircraft, and the assembly unit of the main transmission case 53 can be shortened in the front-rear direction to reduce the distribution cost of assembly units. As a result, a large number of units can be carried in at once from outsourcing.
- the mating projection 30a formed at the distal end of the front split drive shaft piece 30 is fitted into the base fitting recess 31a formed at the base end of the rear split drive shaft piece 31 by an inlay fitting.
- the front divided drive shaft piece 30 and the rear divided drive shaft piece 31 that are formed by being divided can be accurately assembled and interlockedly connected.
- the traveling cylindrical operating body 36 is fitted slidably back and forth over the outer peripheral surface of the outer drive shaft 20 and the outer peripheral surface of the cylindrical support 28, and is fitted to the rear portion of the traveling cylindrical operating body 36.
- a clutch operating piece 36a is provided at the front end of the traveling cylindrical operating body 36, and the clutch operating piece 36a is passively connected to the traveling clutch 21. It is arranged in close proximity to the arm 21a. 38 is a lever support shaft.
- a PTO tubular operating body 39 is fitted to the outer peripheral surface of the traveling tubular operating body 36 so as to be slidable back and forth, and the rear end of the PTO tubular operating body 39 is a base end of a PTO clutch action lever 40. While the parts are interlockingly connected, a clutch action piece 39a is provided at the front end of the PTO cylindrical operating body 39, and the clutch action piece 39a is arranged close to the passive arm 22a of the PTO clutch 22. ing. 41 is a lever support shaft.
- the mission section 4 includes a main transmission mechanism 46 and a subtransmission mechanism 47 which are sequentially extended from the front to the rear in a cylindrical transmission case 45 extending in the front-rear direction.
- a differential mechanism 48 is provided, and a cleave transmission section 49 is detachably attached to the mission case 45, and a cleave transmission mechanism 50 provided in the cleave transmission section 49 is interlocked with the sub transmission mechanism 47.
- a driving system transmission mechanism 51 capable of performing a main transmission, a subtransmission, and a cleaving transmission is formed, and a PTO transmission mechanism 52 is provided between the outer drive shaft 20 and a PTO transmission unit 6 described later. Is interposed.
- the mission case 45 is divided into a main transmission case 53 containing a main transmission mechanism 46 and a case body 54 containing a sub transmission mechanism 47 and a differential mechanism 48.
- the main speed change case 53 has a front end edge detachably connected to the rear end edge portion of the clutch housing 17 by a connection bolt 56a, and a case body 54 is disposed behind the main speed change case 53.
- the front edge is detachably connected to the edge via a support wall forming body 55 by a connection bolt 56b.
- the main transmission case 53 is formed in a tubular shape extending in the front-rear direction, and has an internal support wall 57 formed on the inner peripheral surface of the front part.
- a main transmission mechanism 46 is interposed between the wall forming body 55 and the main transmission mechanism 46 so that a plurality of steps (five steps in this embodiment) of forward shifting operation and reverse switching operation can be performed. .
- the main transmission mechanism 46 supports the front end (rear end) of the rear split drive shaft piece 31 via the bearing 25 at the center of the internal support wall 57.
- the fifth speed gear 31c is integrally formed on the outer peripheral surface of the front end of the rear split drive shaft piece 31 located behind the bearing 25, and the front end fitting recess is formed on the rear end face of the rear split drive shaft piece 31.
- a fitting projection 58a formed by projecting forward from the base end surface (front end surface) of the main transmission main shaft 58 extending forward and rearward in the fitting recess 31d at the distal end side is formed around the axis.
- the front end (rear end) of the main transmission main shaft 58 is rotatably supported around the axis thereof at the center of the support wall forming body 55 via a bearing 59. .
- the main transmission main shaft 58 is provided with fourth, third, second, and first speed gears 60, 61, 62, 63 and a reverse switching gear 64 sequentially from the base end toward the front end. It is mounted coaxially at intervals in the direction and rotatable around the outer peripheral surface of the main transmission main shaft 58.
- the main transmission main shaft 58 is provided with a third variable body 65 disposed between the fifth speed gear 31c and the fourth speed gear 60, and disposed between the third speed gear 61 and the second speed gear 62.
- a second transmission 66 and a first transmission 67 disposed between the first speed gear 63 and the reverse switching gear 64 are attached.
- each of the transmission bodies 65, 66, 67 is a shaft-side interlocking connection piece that is interlockingly 65a, 66a, 67a, front and rear gear-side interlocking connection pieces 65b, 65c, 66b, 66c, 67b, 67c interlockingly connected to the front and rear adjacent gears, and shaft-side interlocking connection pieces 65a, 66a, 67a.
- Slide connection pieces 65d, 66d, 67d are spline-fitted slidably in the axial direction between the respective gear side interlocking connection pieces 65b, 65c, 66b, 66c, 67b, 67c.
- Each of the slide connecting pieces 65d, 66d, 67d is connected to the neutral position located on each of the shaft-side interlocking connecting pieces 65a, 66a, 67a, and to each of the shaft-side interlocking connecting pieces 65a, 66a, 67a.
- a front slide shift position in which the two slide links are interlocked with the slide pieces between the link pieces 65b, 66b, 67b, and the shaft-side interlocking link pieces 65a, 66a, 67a and the rear gear-side interlocking link pieces 65c, 66c,
- the slide position is located between the front and the rear 67c, and the slide operation is possible to one of the rear slide shift positions where the two are linked and connected.
- a main transmission sub shaft 70 extending in the front-rear direction is supported between the internal support wall 57 and the support wall forming body 55 via front and rear bearings 68 and 69.
- the first, second and third transmission gear bodies 71, 72, and 73 are coaxially and rotatably mounted on the outer peripheral surface of 70.
- the front gear 71a and the rear gear 71b integrally formed with the first transmission gear body 71 are combined with the fifth speed gear 31c and the second speed gear 60, respectively, and are also integrated with the second transmission gear body 72.
- the formed front gear 72a and rear gear 72b are engaged with the third speed gear 61 and the second speed gear 62, respectively, and the front gear 73a integrally formed with the third transmission gear body 73 is
- a rear gear 73b integrally formed with the third transmission gear body 73 is coupled to a reverse switching gear 64 via a counter gear 74 which is supported by the support wall member 55 while being engaged with the first speed gear 63.
- 75 is a counter gear support shaft
- 76 is a shaft support provided in the main transmission case 53.
- a slide body support shaft 80 extending in the front-rear direction is provided immediately above the main speed change main shaft 58.
- the lever interlocking shaft 81 extending in the front-rear direction is slidable back and forth in the right and left directions of the slide body support shaft 80, and is slidable back and forth in the orientation.
- the distal end of the engaging piece 82 protruding leftward from the front of the shaft 81 is engaged with the engaged piece 83 provided at the front of the slide body support shaft 80, while extending into the case body 54.
- An action receiving piece 84 is provided at the rear end of the lever interlocking shaft 81, and an action piece 85 a formed at the lower end of the main transmission lever 85 is engaged with the action receiving piece 84.
- Reference numeral 97 denotes an operation receiving piece mounting pin.
- a swing support 86 is provided on the ceiling portion 54c of the case body 54, and as shown in FIG.
- the lower part of the main transmission lever 85 is pivotally supported so that the main transmission lever 85 can swing freely in the front-rear and left-right directions, and the lower end of the action piece 85a formed at the lower end of the main transmission lever 85 is attached to the ceiling. It penetrates through a lever hole 88 formed in the portion 54c and is engaged with the action receiving piece 84.
- a slide regulating body 91 having a side opening 90 and formed in a C-shape as viewed from the rear side is fitted in the middle of the slide body support shaft 80.
- a slide action piece 92 is projected radially from the slide body support shaft 80 through the side opening 90.
- first, second, and third slide bodies 95, 94, and 93 are sequentially attached to the slide body support shaft 80 in the axial direction from the rear to the front, and the third slide body 93 is arranged forward of the slide regulating body 91, while the first and second slide bodies 95 and 94 are arranged behind the slide regulating body 91.
- each of the slide bodies 95, 94, and 93 is slidably fitted to the slide body support shaft 80, and the bosses 95a, 94a, and 93a are moved downward from the bosses 95a, 94a, and 93a.
- Shift forks 95b, 94b, 93b formed by extension, and slide action receiving pieces 95c, 94c, 93c formed by extending toward the slide regulating body 91 from the respective bosses 95a, 94a, 93a. are doing.
- the shift forks 95b, 94b, 93b of the first 'second' third slide bodies 95, 94, 93 are connected to the first, second, and third transmission bodies 67, 66, 65, respectively. It is immovably connected to the pieces 67d, 66d, 65d.
- the sliding action receiving pieces 95c, 94c, 93c of the first and second 'third sliding bodies 95, 94, 93 are formed by rotating the sliding body support shaft 80 around the axis.
- the slide operating body 92 and the slide regulating body 91 By rotating the slide operating body 92 and the slide regulating body 91 in a required direction, the slide working piece 92 is engaged with one required slide working receiving piece, and the slide working receiving piece is brought into contact with the slide body.
- Front and rear sliding of support shaft 80 In addition to operating the slide in conjunction with the movement, at least one of the restriction pieces 91a and 91b protruding from the slide restriction body 91 is engaged with the other two slide action receiving pieces, and both slides are engaged.
- the slide action receiving piece can be restricted from being operated in sliding in conjunction with the sliding movement of the slide body support shaft 80 in the front-rear direction.
- Reference numeral 96 denotes a regulating protruding piece that is suspended from the ceiling portion 54c of the case body 54 in order to regulate the movement of the slide regulating body 91 in the axial direction.
- the main transmission mechanism 46 is configured as described above, and the following describes the shift operation (first shift operation to fifth shift operation and reverse switching operation) of the main transmission mechanism 46.
- the main shift lever 85 is turned rearward while standing upright, and the turning operation force is applied to the action piece 85a formed at the lower end of the main shift lever 85 ⁇ the action receiving piece 84 ⁇ the lever moves sequentially.
- the shaft 81 ⁇ the engagement piece 82 ⁇ the engaged piece 83 ⁇ is transmitted to the slide body support shaft 80, and the slide body support shaft 80 is slid forward.
- the slide action piece 92 is engaged with the slide action receiving piece 95c of the first slide body 95, and the forming pieces 91a and 91b of the slide control body 91 are connected to the second and third slides.
- the slide members 94c, 93c of the bodies 94, 93 are engaged with the slide action receiving pieces 94c, 93c, thereby restricting the movement of the slide bodies 94, 93.
- the main shift lever 85 is turned to the right, and the operating piece 85a formed at the lower end of the main shift lever 85 is turned to the left with the swing support piece 87 as a fulcrum, and the turning power is received.
- the slide regulating body 91 is also rotated clockwise via the slide action piece 92.
- the power transmitted from the engine 15 to the inner drive shaft 19 is converted into the front split drive shaft piece 30 ⁇ the rear split drive shaft piece 31 ⁇ the fifth speed gear 31c ⁇ the front gear 71a of the third speed change gear body 71 ⁇ Main transmission sub shaft 70 ⁇ 2nd transmission gear body? 2 Rear gear 72b ⁇ 2nd speed gear 62 ⁇ rear gear side interlocking connection piece 66 of 2nd transmission 66. ⁇ Slide connecting piece 66d ⁇ Shaft side interlocking connecting piece 66a ⁇ Transmission to main transmission main shaft 58, the second speed change is performed.
- the slide action piece 92 is engaged with the slide action receiving piece 94c of the second slide body 94, and the formation piece 91b of the slide control body 91 is connected to the first and third slide bodies 95.
- , 93 are engaged with the slide action receiving pieces 95c, 93c, and the movement of both slide bodies 95, 93 is regulated.
- the power transmitted from the engine 15 to the inner drive shaft 19 is converted into the front split drive shaft piece 30 ⁇ the rear split drive shaft piece 31 ⁇ the fifth speed gear 31c ⁇ the front gear 71a of the first transmission gear body 71 ⁇ Main transmission countershaft 70 ⁇ Front gear 72a of 2nd transmission gear body 72 ⁇ 3rd speed gear 61 ⁇ Front gear side interlocking connection piece 6613 of 2nd transmission body 66 ⁇ Slide connection piece 66d ⁇ Shaft side interlocking connection piece 66a ⁇
- the power is transmitted to the main transmission main shaft 58, and the third transmission is performed.
- the slide action piece 92 is engaged with the slide action receiving piece 94c of the second slide body 94, and the regulating piece 91b of the slide control body 91 is attached to the first and third slide bodies. Engagement with the slide action receiving pieces 95c, 93c of the 95, 93 restricts the movement of both the slide bodies 95, 93.
- the power transmitted from the engine 15 to the inner drive shaft 19 is divided into the front split drive shaft piece 30 ⁇ the rear split drive shaft piece 31 ⁇ the fifth speed gear 31 c ⁇ the third gear 71 b ⁇ the rear gear 71 b ⁇ 4th gear 62 ⁇ 3rd transmission body 65 rear gear side linking piece 65 ⁇ slide connecting piece 65d ⁇ shaft
- the fourth interlocking connection piece 65a is transmitted to the main transmission main shaft 58 to perform the fourth transmission.
- the slide action piece 92 is engaged with the slide action receiving piece 93c of the third slide body 93, and the regulating piece 91a of the slide control body 91 is attached to the first and second slide bodies.
- the sliding action receiving pieces 95c, 94c of the 95, 94 are engaged to regulate the movement of both the sliding bodies 95, 94.
- the slide action piece 92 is engaged with the slide action receiving piece 93c of the third slide body 93, and the regulating piece 91a of the slide control body 91 is attached to the first and second slide bodies. Engagement with the slide action receiving pieces 95c, 94c of the 95, 94 restricts the movement of both the slide bodies 95, 94.
- the main shift lever 85 is turned upright in a state of standing substantially vertically, and the turning operation force is applied to the operating piece 85a formed at the lower end of the main shift lever 85 ⁇ the action receiving piece 84 ⁇ lever linkage
- the shaft 81 ⁇ engagement piece 82 ⁇ engaged piece 83 ⁇ is transmitted to the slide body support shaft 80, and the slide body support shaft 80 is slid backward.
- the slide action piece 92 is engaged with the slide action receiving piece 95c of the first slide body 95, and the forming pieces 91a and 91b of the slide control body 91 are connected to the second 'third slide 95.
- the slide members 94c and 93c of the bodies 94 and 93 are engaged with the slide action receiving pieces 94c and 93c, thereby restricting the movement of the slide bodies 94 and 93.
- the case body 54 is formed in a tubular shape extending in the front-rear direction, and a shaft support wall 100 is formed in the middle of the inner peripheral surface.
- the sub transmission mechanism 47 is disposed at a position in front of the shaft support wall 100, and a differential mechanism 48 is disposed at a position behind the coaxial support wall 100.
- An opening 101 is formed in the right side wall 54b of the case body 54 located in front of the shaft support wall 100, and a creep transmission unit 49, which will be described later, is detachably attached through the opening 101.
- An opening 102 is formed in the bottom portion 54d, and a front wheel drive power take-out portion 103, which will be described later, is attached through the opening 102.
- the creep speed change portion 49 and the front wheel drive power take-out portion 103 are respectively provided. It is linked to the auxiliary transmission mechanism 47.
- openings 104, 104 are formed in the left and right side walls 54a, 54b, respectively, of the case body 54 located rearward of the shaft support wall 100, and through the openings 104, 104, respectively.
- the rear axle cases 8 and 8 are connected to each other, and the rear axles 105 and 105 extending in the left-right direction are inserted into the rear axle cases 8 and 8 and supported rotatably. 105 is linked to the differential mechanism 48.
- a maintenance opening 106 is formed in the ceiling of the case body 54 located behind the shaft support wall 100, and the opening 106 is detachably attached to the cover 107.
- a lift arm support 108 is formed by swelling upward, and a lift arm support with its axis oriented in the left-right direction is placed above the lift arm support 108.
- the shaft 109 is penetrated and rotatably supported, and base ends of a pair of left and right lift arms 110 are attached to left and right ends of the lift arm support shaft 109.
- a PT transmission section 6 is attached to an opening 111 formed at the rear end of the case body 54.
- port ⁇ link connecting pins 112, 112 are protruded outward, and a pair of left and right lower links 13, 13 is formed.
- the front end is rotatably supported by the case body 54 via the mouth link connecting pins 112, 112.
- the auxiliary transmission mechanism 47 is configured by interlockingly connecting an auxiliary transmission shaft 116 to a front end (rear end) of the main transmission main shaft 58 via a planetary gear mechanism 115.
- the leading end of the main shaft 58 extends rearward to form a sun gear 117 which constitutes a part of the planetary gear mechanism 115, while the sub-transmission shaft 116 is arranged on the same axis as the main transmission main shaft 58, and has a middle part.
- a shaft support 118 provided in the case body 54 is supported via a bearing 119, and a front end (rear end) is supported on the shaft support wall 100 via a bearing 120.
- the planetary gear mechanism 115 includes a pair of front and rear inner gear supports 121 and 122 formed in a ring shape and arranged on the outer periphery of the sun gear 117 on the support wall forming body 55 by mounting bolts 123 oriented in the front and rear direction. Attach and support both inner gears 124 between both inner gear supports 121 and 122, and arrange a plurality of planet gears 125 at intervals in the circumferential direction of the inner gear 124, and connect each planet gear 125 to the inner gear. While being engaged with both the sun gear 117 and the sun gear 117, a carrier 128 is mounted between the inner peripheral edges of the pair of front and rear inner gear supports 121 and 122 via a pair of front and rear bearings 126 and 127. A plurality of planetary gears 125 are integrally linked to the 128.
- the carrier 128 has a rear end edge extending rearward of the rear bearing 127 to form a cylindrical gear forming piece 129, and has an internal tooth 130 on the inner peripheral surface of the gear forming piece 129.
- the outer teeth 131 as creep drive gears are formed on the outer peripheral surface of the gear forming piece 129.
- a cylindrical shift gear support 132 is spline-fitted between the outer peripheral surface of the sun gear 117 and the outer peripheral surface of the base end (front end) 114 of the auxiliary transmission shaft 116 so as to be shiftable in the axial direction.
- the front shift gear 133 is integrally formed on the front outer peripheral surface of the shift gear support 132
- the rear shift gear 134 is integrally formed on the rear outer peripheral surface.
- a fork shaft 135 having an axis directed forward and rearward is disposed on the right side in the case body 54.
- a base end 137 of the shift fork 136 is slidably attached to the shift gear support 132 while a front end 138 of the shift fork 136 is engaged with the shift gear support 132.
- a boss 140 having an axis oriented in the left-right direction is formed on a lid 139 which forms a part of the cleave transmission section 49 described later, and a lever support shaft 141 is inserted through the boss 140 to form the lever support. Attach the base end of the auxiliary transmission lever 142 to the outer end of the shaft 141, and attach the base end of the interlocking arm 143 to the inner end of the lever support shaft 141.
- the base 137 of the shift fork 136 is connected via 144.
- the shift gear support 132 is shifted in the front-rear direction to perform the sub-transmission operation.
- the shift gear support 132 is shifted to a state of being bridged between the outer peripheral surface of the sun gear 117 and the outer peripheral surface of the base end (front end) 114 of the subtransmission shaft 116, and the shift gear
- the sun gear 117 and the auxiliary transmission shaft 116 are interlocked and connected via the support 132 (the main transmission main shaft 58 and the auxiliary transmission shaft 116 are directly connected). .
- the interlocking arm 143 When the auxiliary transmission lever 142 is rotated forward, the interlocking arm 143 is turned rearward via the lever support shaft 141, and is connected to the distal end of the interlocking arm 143 via the frame 144.
- the shift fork 136 is slid rearward, and the shift gear support 132 engaged with the shift fork 136 is shifted rearward.
- the shift gear support 132 is detached from the outer peripheral surface of the sun gear 117 and is shifted on the outer peripheral surface of the base end (front end) 114 of the sub-variable shaft 116, and the front shift gear 133 Are engaged with the internal teeth 130 formed on the inner peripheral surface of the gear forming piece 129.
- the rotational power of the sun gear 117 integrally formed with the main transmission main shaft 58 is transmitted by the planetary gear 125, the carrier 128, and the gear forming piece 129 formed integrally with the sun gear 117.
- the gear 130 is transmitted to the front shift gear 133 of the shift gear support 132 ⁇ the shift gear support 132 ⁇ the proximal end 114 of the auxiliary transmission shaft 116.
- the reduced speed power is transmitted from the main transmission main shaft 58 to the auxiliary transmission shaft 116 via the planetary gear mechanism 115, and the auxiliary transmission is performed.
- the creep transmission portion 49 performs a creep speed change (an ultra-low speed change).
- the tally transmission section 49 is provided with an opening 101 formed in the right side wall of the case main body 54, and a cover body.
- the cover 139 is removably attached by mounting bolts 145 to close the lid, and a creep speed change mechanism 146 is detachably attached to the inner surface of the lid 139.
- the creep transmission mechanism 146 includes a pair of front and rear shaft support pieces 147 and 148 protruding from the inner surface of the cover 139, and a detachably mounted gear support shaft 149 whose axis is oriented in the front-rear direction.
- a creep transmission gear body 151 is rotatably mounted on 149 via a bearing 150.
- a large-diameter input gear 152 and a small-diameter output gear are provided at the front and rear of the creep transmission gear body 151.
- 153 is integrally formed.
- the input gear 152 is detachably engaged with the external teeth 131 as a creep drive gear formed on the outer peripheral surface of the gear forming piece 129, and the output gear 153 is connected to the auxiliary transmission shaft 116 via the bearing 154.
- the creep transmission gear 155 is removably coupled to the rotatably mounted creep transmission gear 155.
- a rear shift gear 134 integrally formed on the rear outer peripheral surface of the shift gear support 132 is fitted into the front surface of the creep transmission gear 155.
- An engagement joint gear 156 is formed.
- the shift gear support 132 is detached from the outer peripheral surface of the sun gear 117, is shifted on the outer peripheral surface of the base end (front end) 114 of the sub-variable shaft 116, and the rear shift key 134 is creeped.
- the transmission gear 155 is fitted and engaged with a fitting gear 156 formed on the front surface.
- the power reduced to an extremely low speed is transmitted from the main transmission main shaft 58 to the auxiliary transmission shaft 116 via the planetary gear mechanism 115 and the creep transmission mechanism 146, and the creep transmission is performed.
- the creep transmission mechanism 146 is connected to the planetary gear. Although it is placed compactly around the periphery of mechanism 115, As a result, it is possible to avoid an increase in the length of the mission section 4.
- the speed change operation mechanism can be simplified.
- a creep speed change mechanism 146 is attached to the lid 139 to form a creep speed change section 49.
- the creep speed change section 49 is configured such that the body 139 is detachably attached to an opening 101 formed in the case body 54. Since the lid is closed, the assemblability of the clip transmission section 49 can be improved.
- the creep transmission mechanism 146 is detached from the cover 139, and the cover 139 is attached to the opening 101 of the case body 54, so that the creep from the creep specification is removed.
- the specification can be easily changed to the specification without.
- the creep speed change mechanism 146 may be attached to the lid 139, and specifications with and without creep can be easily set.
- the front wheel drive power take-out portion 103 is attached to an opening portion 102 formed at the bottom of the case main body 54 by a mounting port 161.
- a front wheel drive shaft 164 whose axis is oriented in the front-rear direction is mounted via a pair of front and rear bearings 162, 163, and an input gear 165 is mounted in a middle part of the front wheel drive shaft 164.
- the first and second intermediate gears 167 and 168 are interposed between the output gear 166 and the output gear 166 attached to the rear part of the auxiliary transmission shaft 116.
- the first intermediate gear 167 is rotatably mounted on a PTO system transmission shaft 169 described later via a bearing 170
- the second intermediate gear 168 is formed as a pair of front and rear parts formed to protrude into the case body 54.
- a gear support shaft 173 is mounted on the gear support pieces 171 and 172, and is rotatably mounted on the gear support shaft 173 via a bearing 174.
- the output gear 166, the first intermediate gear 167, the second intermediate gear 168, and the input gear 165 are connected in series and linked.
- the front wheel drive shaft 164 has a front end 175 protruding forward from the extraction case 160, and the front end 175 is transmitted to an input shaft (not shown) provided on the front axle case. And are linked through a link.
- the rotational power of the auxiliary transmission shaft 116 is output from the output gear 166 attached to the auxiliary transmission shaft 116 ⁇ the first intermediate gear 167 ⁇ the second intermediate gear 168 ⁇ the input gear 165 ⁇ the front wheel drive shaft 164 ⁇ the transmission It is transmitted to the shaft, etc. ⁇ input shaft ⁇ front axle ⁇ front wheels 7, 7 so that four-wheel drive travel can be performed.
- the input gear 165 is spline-fitted to an intermediate portion of the front wheel drive shaft 164 so that the input gear 165 can be shifted between a position where the input gear 165 is engaged with the second intermediate gear 168 and a position where the engagement is released.
- the shift operation of the input shaft 165 can be performed by a shift operation mechanism (not shown) from outside the extraction unit case 160.
- the differential mechanism 48 is interposed between the sub-transmission shaft 116 and the pair of left and right rear axles 105, 105, and extends rearward from the shaft support wall 100.
- An output bevel gear 180 is integrally formed at the front end (rear end) of the sub-transmission shaft 116, and rear axle input gears 181 and 181 are attached to the base end of each rear axle 105. Output bevel gear 180 through the differential mechanism 48 to each rear axle input gear.
- the differential mechanism 48 has a large reduction gear 183 that is coupled to the output bevel gear 180 mounted on the outer peripheral surface of the differential case 182, and a small differential gear shaft that extends in the front-rear direction inside the differential case 182.
- a pair of front and rear small differential gears 185 and 185 are rotatably mounted via 184, and a pair of left and right large differential gears 187 via a pair of left and right large differential gear shafts 186 and 186 extending in the left-right direction. , 187 are attached, and each large differential gear 187, 187 is combined with both small differential gears 185, 185.
- each large differential gear support shaft 186, 186 is detachably connected to a traveling brake 192, 192 of a brake unit 191, 191 described later.
- the pair of left and right cylindrical shaft supports 189, 189 are fitted from outside into the mounting openings 194, 194 formed in the left and right side walls 54a, 54b of the case body 54, and are attached and detached by the mounting bolts 195, 195.
- the differential case 182 is detachably mounted between the two cylindrical shaft supports 189, 189.
- the cylindrical shaft supports 189, 189 can be removed from the case body 54 by pulling them outward from the mounting openings 194, 194.
- the large differential gear shafts 186, 186 can also be removed by pulling them out of the differential case 182 integrally with the cylindrical shaft supports 189, 189.
- the differential case 182 which is detachably mounted between the two cylindrical shaft supports 189, 189, is provided with a maintenance formed on the ceiling of the case body 54 after each cylindrical shaft support 189, 189 is removed. Can be taken out from the opening 106 for use.
- the brake unit 191 has a travel brake 192 disposed in a brake case 196, and the travel brake 192 can be braked and released by a brake operation lever 198 via a brake action piece 197. Like that. 199 is brake This is a brake lever support shaft pivoted to the case 196.
- the brake case 196 is detachably attached to the side wall of the case body 54 and the base of the outer peripheral surface of the rear axle case 8 in a bridging state. By removing the brake case 196 from these, the brake case 196 is removed. The traveling brake 192 can be detached from the distal end of the large differential gear support shaft 186 integrally with the brake case 196.
- the differential mechanism 48 has a configuration in which the large reduction gear 183 is attached to the output bevel gear 180 from the right side as shown in FIG. 9 (a), and as shown in FIG. 9 (b).
- the differential mechanism 48 may be turned upside down and turned left and right, and the large reduction gear 183 may be combined with the output bevel gear 180 from the left side and mounted. I can do it.
- the forward direction (main working direction) of the tractor A can be easily changed by selecting the mounting form of the differential mechanism 48 according to the working machine connected to the tractor A and the working form.
- FIG. 8 the configuration of the PTO transmission section 6 will be described with reference to FIGS. 8, 10, and 11.
- the PTO transmission section 6 is configured such that an opening 111 formed at the rear end of the case A PTO transmission mechanism 201 is provided in a case 200.
- the PTO case 200 is formed from a front case forming body 202 arranged to be accommodated in the case main body 54 and a rear case forming body 203 arranged to bulge rearward from the case main body 54.
- a flange-shaped mounting piece 204 is integrally formed on a peripheral edge of a front end of the rear case forming body 203, and the mounting piece 204 is brought into contact with a rear end edge of the case body 54 from the rear, and an axial line in the front-rear direction. It is attached with the mounting bolt 205 facing.
- a top link bracket 206 for pivotally connecting the front end of the top link 12 is attached between the rear portion of the lift arm support 108 and the upper portion of the rear edge of the case body 54.
- the top link bracket 206 has a plate-shaped mounting seat 207 that is in contact with the rear of the lift arm support 108 and the upper end of the rear end edge of the case body 54 and is mounted with mounting bolts 210.
- 207 is formed of a pair of left and right plate-shaped pivoting and connecting pieces 208, 208 projecting rearward from the rear surface.
- 209 is a connection hole.
- the lower portion of the mounting seat 207 is brought into contact with the mounting piece 204 of the rear case forming body 203 from the rear to form a superposed state, and is fastened together with the mounting bolt 205 to be mounted on the rear edge of the case body 54. I have.
- lift cylinder support shafts 211, 211 as a lift cylinder mounting portion are provided to protrude outward, and the lift cylinder support shafts 211, 211 and the lift arms 110, 211 are provided.
- Lift cylinders 212, 212, which extend and contract in the vertical direction, are provided between them and the middle part of the 110.
- 213 is a lift cylinder connecting pin
- 214 is a lift cylinder pivot connecting piece.
- a pair of left and right lift cylinders 212, 212 which expand and contract in the vertical direction are arranged at the left and right lateral positions of the rear case forming body 203, and the lower ends of the lift cylinders 212, 212 are connected to the lift cylinder support shafts. Since it is supported by the rear case forming body 203 via 211, 211, both lift cylinders 212, 212 can be easily arranged in a vertical or substantially vertical posture, and the strokes of the lift cylinders 212, 212 can be easily adjusted. It is possible to reduce the size of each of the lift cylinders 212, 212, and to reduce power loss.
- the lift cylinders 212 are strongly supported. Can be.
- the left and right widths of the rear case forming body 203 are reduced, and the pair of left and right lift cylinders 212 are arranged at the left and right lateral positions of the rear case forming body 203.
- the degree of freedom of the mounting position of the lifting link mechanism on the case main body 54 can be increased.
- the PTO transmission mechanism 201 includes an input shaft 220 having a longitudinal axis oriented in a PT ⁇ ⁇ case 200, a transmission shaft 221 and a transmission shaft 221.
- the shaft 222 is rotatably supported via bearings 223, 224, 225, 226, 227, 228, respectively.
- the input shaft 220 has an input shaft projection 239 formed on the front wall of the PTO case 200.
- the PTO shaft 222 has the tip portion 242 projecting rearward from the PTO shaft projection 241 formed on the rear wall of the PTO case 200, while the tip portion 240 projects forward from the front.
- the output gear 229 is provided on the input shaft 220, and the large-diameter input gear 230, the first transmission gear 231 and the second transmission gear 232 are coaxially mounted on the transmission shaft 221. Coupled with gear 229.
- a shift gear body 233 is spline-fitted to the PTO shaft 222 so that it can slide in the axial direction, and an input gear 235 is rotatably mounted via a bearing 234.
- the large-diameter shift gear is attached to the shift gear body 233. While the 236 and the small-diameter shift gear 237 are provided, the fitting gear 238 into which the small-diameter shift gear 237 is fitted is formed on the front surface of the input gear 235.
- the first gear shift operation in which the large-diameter shift gear 236 is engaged with the first gear shift 231 and the small-diameter shift gear 237 is engaged with the engagement gear 238 by the PTO gear shift operation mechanism (not shown).
- the second PTO speed change operation to be combined can be performed.
- the tip 240 of the input shaft 220 is linked to the outer drive shaft 20 via a PTO transmission shaft 169 to form a PTO transmission mechanism 52.
- the shaft 169 is disposed in the mission case 45 so as to face the front-rear direction from the front part to the rear part.
- the PTO transmission shaft 169 is formed by connecting the first to fourth divided transmission shafts 245, 246, 247, 248 in the front-rear direction.
- the first split transmission shaft 245 is rotatable between the rear wall 27 of the clutch housing 17 and the internal support wall 57 via bearings 249 and 250.
- An input gear 244 is provided in the middle of the first split transmission shaft 245, and the input gear 244 is connected to the PTO horse gear 20c.
- the second split transmission shaft 246 allows the support wall forming body 55 to rotatably support the intermediate portion via the bearing 251 and the front end portion to the first end. It is connected to the rear end of the split transmission shaft '245 via a first tubular connector 252.
- the third split transmission shaft 247 allows the shaft support 118 to rotatably support an intermediate portion via a bearing 253, and a front end of the third split transmission shaft 246 to the second split transmission shaft 246.
- the rear end is connected via a second tubular connector 254.
- the fourth divided transmission shaft 248 has a front end connected to a rear end of the third divided transmission shaft 247 via a one-way clutch 255, and a rear end connected to the rear end.
- the distal end 240 of the input shaft 220 is connected via a third tubular connector 256.
- the one-way clutch 255 is formed by a front clutch forming body 257 attached to the rear end of the third split transmission shaft 247 and a rear clutch forming body 258 attached to the front end of the fourth split transmission shaft 248.
- the coupling piece 259 protruding from the rear surface of the front clutch forming body 257 and the coupling piece 260 protruding from the front face of the rear clutch forming body 258 are joined in the front-rear direction.
- the third and fourth split transmission shafts 247 and 248 rotate physically in the forward rotation direction while the pieces 259 and 260 are engaged, while the combined pieces 259 and 260 do not engage in the reverse rotation. I have.
- the power transmitted to the input shaft 220 is changed to the output gear 229 ⁇ the large diameter input gear 230 ⁇ the speed change shaft 221 ⁇ the first speed change operation.
- the gear 231 is transmitted to the large-diameter shift gear 236 of the shift gear body 233 and then to the PTO shaft 222. Power can be taken out from the PTO shaft 222 to drive various working machines.
- the power transmitted to the input shaft 220 is output from the output gear 229 ⁇ the large-diameter input gear 230 ⁇ the speed change shaft 221 ⁇ the second speed change gear 232 ⁇
- the power is transmitted from the gear 235 to the small-diameter shift gear 237 of the shift gear body 233 to the PTO shaft 222, and power can be taken out from the PTO shaft 222 to drive various working machines.
- the power is transmitted from the PTO shaft 222 to the traveling system transmission mechanism 51 including the main transmission mechanism 46 in the reverse direction and transmitted, thereby preventing the traveling system transmission mechanism 51 from being damaged. be able to.
- the input gear 244 provided on the first split transmission shaft 245 is combined with the PTO drive gear 300 provided on the rear split drive shaft piece 31.
- the first split transmission shaft 245 ⁇ input gear 244 ⁇ PTO drive gear 300 ⁇ rear split drive shaft piece 31 ⁇ main transmission main shaft 58 prevents one-way clutch 255 from transmitting power in reverse. can do.
- FIG. 13 shows a subtransmission mechanism 47 as another embodiment.
- the subtransmission mechanism 47 is provided with a planetary gear mechanism 265 for subtransmission at a front end (rear end) of a main transmission main shaft 58.
- the auxiliary transmission shaft 116 is interlockingly connected via a planetary gear mechanism 266 for creep transmission.
- the tip of the main transmission main shaft 58 is extended rearward to form one of the planetary gear mechanisms 265 for auxiliary transmission. And a sun gear 267 which constitutes the same part, and an intermediate shaft 269 is arranged on the same axis line between the main transmission main shaft 58 and the auxiliary transmission shaft 116 via a planetary gear mechanism support 268 to form the intermediate gear 269.
- the tip is a sun gear 270 that forms part of a planetary gear mechanism 266 for creep speed change.
- the sub-gear planetary gear mechanism 265 includes an inner gear support 273 formed in a ring shape and disposed on the outer periphery of the sun gear 267 on the support wall forming body 55 by a mounting bolt 274 having an axis oriented in the front-rear direction.
- the inner gear support 273 supports the inner gear 275 in a cantilever manner.
- a plurality of planet gears 276 are arranged at intervals in the circumferential direction of the inner gear 275, and each planet gear 276 is connected to the inner gear 275 and the sun gear 270.
- a carrier 277 is attached to the inner peripheral edge of the inner gear support 273, and a plurality of planet gears 276 are integrally connected to the carrier 277.
- the carrier 277 has a rear end edge portion extending rearward to form a cylindrical gear forming piece 278, and has an internal tooth 279 formed on the inner peripheral surface of the gear forming piece 278.
- a cylindrical shift gear support 281 is spline-fitted between the outer peripheral surface of the sun gear 267 and the outer peripheral surface of the base end (front end) 280 of the intermediate shaft 269 so as to be able to shift in the axial direction.
- the shift gear 282 is formed integrally with the front outer peripheral surface of the shift gear support 281.
- the planetary gear mechanism 266 for creep shifting is attached to the planetary gear mechanism support 268 by a mounting bolt 284 formed in a ring shape and disposed on the outer periphery of the sun gear 270 with an axial line oriented in the front-rear direction.
- the inner gear support 283 supports the inner gear 285 in a cantilever manner. While the inner peripheral portion of the inner gear support 283 is A plurality of planetary gears 286 are integrally linked to the carrier 287.
- the carrier 287 has a rear end edge portion extending rearward to form a cylindrical gear forming piece 288, and has an internal tooth 289 formed on the outer peripheral surface of the gear forming piece 288.
- a cylindrical shift gear support 290 is spline-fitted between the outer peripheral surface of the sun gear 270 and the outer peripheral surface of the base end (front end) 114 of the auxiliary transmission shaft 116 so as to be shiftable in the axial direction.
- the shift gear 291 is integrally formed on the front outer peripheral surface of the shift gear support 290.
- the shift gear support 281 is shifted in the front-rear direction to perform the sub-transmission operation.
- the shift gear support 281 is bridged between the outer peripheral surface of the sun gear 267 and the outer peripheral surface of the base end (front end) 280 of the intermediate shaft 269.
- the state is shifted to a state in which the sun gear 267 and the intermediate shaft 269 are interlockingly connected via the shift gear support 281 (a state in which the main transmission main shaft 58 and the intermediate shaft 269 are directly connected). Therefore, at this shift position, power is transmitted from the sun gear 267 integrally formed with the main transmission main shaft 58 to the intermediate shaft 269 via the shift gear support 281.
- the shift gear support 281 When the sub-transmission lever is rotated forward, the shift gear support 281 is disengaged from the outer peripheral surface of the sun gear 267 and is shifted on the outer peripheral surface of the base end (front end) 280 of the intermediate shaft 269. At the same time, the shift gear 282 is engaged with the internal teeth 279 formed on the inner peripheral surface of the gear forming piece 278.
- the rotational power of the sun gear 267 integrally formed with the main transmission main shaft 58 is transmitted by the planetary gear 276 which is combined with the sun gear 267 ⁇ the carrier 277 ⁇ the gear forming piece 278 which is integrally formed with the carrier 277.
- the tooth 279 is transmitted to the shift gear 282 of the shift gear support 281 ⁇ the shift gear support 281 ⁇ the proximal end 280 of the intermediate shaft 269.
- the reduced power is transmitted from the main transmission main shaft 58 to the intermediate shaft 269 via the planetary gear mechanism 265, and the subtransmission is performed.
- the shift gear support 290 of the planetary gear mechanism 266 for creep shifting is placed between the outer peripheral surface of the sun gear 270 and the outer peripheral surface of the base end (front end) 114 of the auxiliary transmission shaft 116.
- the sun gear 270 and the auxiliary transmission shaft 116 are interlocked and connected via the shift gear support 290.
- the creep shift (very low speed shift) is performed by the planetary gear mechanism 266 for creep shift.
- the shift gear support 281 is disengaged from the outer peripheral surface of the sun gear 267 and shifts onto the outer peripheral surface of the base end (front end) 114 of the sub-transmission shaft 116.
- the shift gear 282 is engaged with the internal teeth 289 formed on the inner peripheral surface of the gear forming piece 288.
- the reduced power is transmitted from the intermediate shaft 269 to the sub-transmission shaft 116 via the planetary gear mechanism 266, so that a creep speed change (an extremely low speed change) is performed.
- FIG. 14 shows a subtransmission mechanism 47 according to another embodiment.
- the subtransmission mechanism 47 is provided at the front end (rear end) of the main transmission main shaft 58 and at the planetary gear mechanism 265.
- the sub-transmission shaft 116 is interlocked and connected via a shaft, and has the same basic configuration as the sub-transmission mechanism 47 of the above-described embodiment, except that the planetary gear mechanism 266 and the intermediate shaft 269 for the cleave speed change. It is essentially different in that it does not have a creep shifting function.
- the planetary gear mechanism 265 for the sub-transmission is configured such that the cylindrical shift gear support 281 is disposed between the outer peripheral surface of the sun gear 267 and the outer peripheral surface of the base end (front end) 114 of the sub-transmission shaft 116.
- the shift gear 282 is integrally formed on the front outer peripheral surface of the shift gear support 281.
- the shift gear support 281 is shifted in the front-rear direction to perform the sub-transmission operation.
- the shift gear support 281 is moved between the outer peripheral surface of the sun gear 267 and the outer peripheral surface of the base end (front end) 114 of the auxiliary transmission shaft 116.
- the gear is shifted to the bridged state, and the sun gear 267 and the auxiliary transmission shaft 116 are interlocked and connected via the shift gear support 281 (the main transmission main shaft 58 and the auxiliary transmission shaft 116 are directly connected). It becomes.
- the shift gear support 281 When the sub-transmission lever is rotated forward, the shift gear support 281 is detached from the outer peripheral surface of the sun gear 267, and is shifted on the outer peripheral surface of the base end (front end) 114 of the sub-transmission shaft 116. At the same time, the shift gear 282 is engaged with the internal teeth 279 formed on the inner peripheral surface of the gear forming piece 278.
- the rotational power of the sun gear 267 integrally formed with the main transmission main shaft 58 is transmitted by the planetary gear 276 which is combined with the sun gear 267 ⁇ the carrier 277 ⁇ the gear forming piece 278 which is integrally formed with the carrier 277.
- the tooth 279 is transmitted to the shift gear 282 of the shift gear support 281 ⁇ the shift gear support 281 ⁇ the base end (front end) 114 of the auxiliary transmission shaft 116.
- the mission section is linked to the prime mover section, and power can be transmitted from the mission section to the front wheels and the rear vehicle, respectively, to enable traveling. Tractor with a creep speed change section Tied.
- the mission portion is provided with a planetary gear mechanism capable of reducing the power from the main transmission mechanism, and the carrier constituting a part of the planetary gear mechanism is provided in the mission section.
- a creep drive gear is provided, and the input gear of the creep transmission mechanism provided in the creep transmission section is detachably connected to the creep drive gear.
- the carrier of the planetary gear mechanism provided in the mission section is provided with the creep drive gear, and the input gear of the cleave transmission mechanism provided in the cleave transmission section is detachably coupled to the cleave drive gear.
- the creep speed change mechanism can be compactly arranged at the periphery of the planetary gear mechanism, so that an increase in the length of the mission section can be avoided.
- the creep speed change operation can be performed linearly in the axial direction of the planetary gear mechanism, the speed change operation mechanism can be simplified.
- an opening is formed in the mission case of the mission portion, a lid is detachably attached to the opening, and the lid is closed, and the inner surface of the lid is closed.
- a creep speed change mechanism is attached to the creep speed change mechanism.
- the creep speed change mechanism is configured by attaching the creep speed change mechanism to the lid, and the creep speed change section is configured such that the lid is detachably attached to the opening formed in the mission case to close the lid. Therefore, the assemblability of the creep transmission portion can be improved.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Arrangement Of Transmissions (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
- General Details Of Gearings (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003255138A AU2003255138A1 (en) | 2003-05-21 | 2003-07-17 | Tractor |
US10/558,146 US20070069488A1 (en) | 2003-05-21 | 2003-07-17 | Tractor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-143938 | 2003-05-21 | ||
JP2003143938A JP4184866B2 (ja) | 2003-05-21 | 2003-05-21 | トラクタ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004103759A1 true WO2004103759A1 (ja) | 2004-12-02 |
Family
ID=33475146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/009130 WO2004103759A1 (ja) | 2003-05-21 | 2003-07-17 | トラクタ |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070069488A1 (ja) |
JP (1) | JP4184866B2 (ja) |
CN (1) | CN100430257C (ja) |
AU (1) | AU2003255138A1 (ja) |
WO (1) | WO2004103759A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101107021B1 (ko) | 2008-11-07 | 2012-01-25 | 동양물산기업 주식회사 | 농업용 트랙터의 옵션 변경이 용이한 트랜스미션 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS497652Y1 (ja) * | 1970-07-30 | 1974-02-22 | ||
JPS5315880Y2 (ja) * | 1973-03-08 | 1978-04-26 | ||
JPS55170544U (ja) * | 1979-05-24 | 1980-12-08 | ||
JPS55177542U (ja) * | 1979-06-08 | 1980-12-19 | ||
JPS5738939U (ja) * | 1981-04-22 | 1982-03-02 | ||
JPS57100647U (ja) * | 1981-04-22 | 1982-06-21 | ||
WO2002034561A1 (fr) * | 2000-10-20 | 2002-05-02 | Yanmar Agricultural Equipment Co., Ltd. | Dispositif de transmission d'énergie pour véhicule |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5315800Y2 (ja) * | 1974-04-20 | 1978-04-25 | ||
US4611504A (en) * | 1984-07-05 | 1986-09-16 | Rundle Kenneth P | Garden tractor transaxle with planetary differential input |
GB2180604B (en) * | 1985-09-11 | 1990-03-28 | Kubota Ltd | Transmission system for vehicle having planetary gear type forward and backward drive switching apparatus |
CN2227061Y (zh) * | 1994-12-16 | 1996-05-15 | 任守信 | 一种拖拉机变型的多用动力底盘 |
US5573471A (en) * | 1995-03-17 | 1996-11-12 | Case Corporation | Transmission for an off-highway implement |
-
2003
- 2003-05-21 JP JP2003143938A patent/JP4184866B2/ja not_active Expired - Fee Related
- 2003-07-17 AU AU2003255138A patent/AU2003255138A1/en not_active Abandoned
- 2003-07-17 CN CNB038264978A patent/CN100430257C/zh not_active Expired - Fee Related
- 2003-07-17 WO PCT/JP2003/009130 patent/WO2004103759A1/ja active Application Filing
- 2003-07-17 US US10/558,146 patent/US20070069488A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS497652Y1 (ja) * | 1970-07-30 | 1974-02-22 | ||
JPS5315880Y2 (ja) * | 1973-03-08 | 1978-04-26 | ||
JPS55170544U (ja) * | 1979-05-24 | 1980-12-08 | ||
JPS55177542U (ja) * | 1979-06-08 | 1980-12-19 | ||
JPS5738939U (ja) * | 1981-04-22 | 1982-03-02 | ||
JPS57100647U (ja) * | 1981-04-22 | 1982-06-21 | ||
WO2002034561A1 (fr) * | 2000-10-20 | 2002-05-02 | Yanmar Agricultural Equipment Co., Ltd. | Dispositif de transmission d'énergie pour véhicule |
Also Published As
Publication number | Publication date |
---|---|
CN100430257C (zh) | 2008-11-05 |
JP2004345476A (ja) | 2004-12-09 |
US20070069488A1 (en) | 2007-03-29 |
CN1771146A (zh) | 2006-05-10 |
JP4184866B2 (ja) | 2008-11-19 |
AU2003255138A1 (en) | 2004-12-13 |
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